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September Weather in Port Jervis, United States

Last updated: June 24, 2025

In September, the average temperature in Port Jervis, United States hovers around 18°C (65°F). Expect lows of 3°C (38°F) and highs reaching up to 32°C (89°F). The region experiences an average of 100 mm (3.9 in) of rainfall spread over 9 days, with a humidity level averaging 68%. Plan accordingly for a mix of warm days and refreshing showers!

September Temperature in Port Jervis

In September in Port Jervis, the average temperature is 18°C (65°F). The maximum can reach 32°C (89°F), while the minimum can drop as low as 3°C (38°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities and explore the local attractions comfortably.

September Weather in Port Jervis: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Port Jervis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Jervis, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (89°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec293237485968737165554133
Data source: Temperature data for Port Jervis generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Port Jervis

In Port Jervis in September, the precipitation amount is 100 mm (3.9 in) spread over 9 days.

September Precipitation Trends in Port Jervis

The chart displays monthly precipitation patterns in Port Jervis, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Port Jervis, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7198911111251001131211001448898
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Port Jervis

In Port Jervis in September, humidity is 68%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel somewhat sticky and requiring occasional breaks for refreshing hydration.

September Average Humidity in Port Jervis

This chart illustrates the average monthly humidity levels in Port Jervis, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Port Jervis is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Port Jervis

In Port Jervis in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Port Jervis.

Maximum UV Index Levels in Port Jervis for September

The chart shows the monthly maximum UV Index (UVI) for Port Jervis in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Port Jervis typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Port Jervis September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Port Jervis Compares to Other Months

Weather in Port Jervis varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port Jervis, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Port Jervis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)71 mm (2.8 inches)84%moderate
February Weather0°C (32°F)98 mm (3.9 inches)82%moderate
March Weather3°C (37°F)91 mm (3.6 inches)81%high
April Weather9°C (48°F)111 mm (4.4 inches)78%very high
May Weather15°C (59°F)125 mm (4.9 inches)69%very high
June Weather20°C (68°F)100 mm (3.9 inches)69%very high
July Weather23°C (74°F)113 mm (4.5 inches)62%very high
August Weather22°C (72°F)121 mm (4.8 inches)65%very high
September Weather18°C (65°F)100 mm (3.9 inches)68%very high
October Weather13°C (55°F)144 mm (5.7 inches)74%high
November Weather5°C (41°F)88 mm (3.5 inches)82%moderate
December Weather1°C (33°F)98 mm (3.8 inches)80%low

Compare Port Jervis's Climate with Cities Worldwide